From d9d11fc612444e0b64fa1f35bd3f6ec5cc2bc86a Mon Sep 17 00:00:00 2001
From: shuangtai <shuangtai.tian@intel.com>
Date: Tue, 10 Jun 2014 14:27:53 +0800
Subject: use six.add_metaclass

Using six.add_metaclass instead of "__metaclass__" for Python 3.x
compatibility.

Change-Id: I8bf33fb1770511657587c8f7a33acfcf9a351e79
---
 requirements.txt          | 1 +
 stevedore/example/base.py | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/requirements.txt b/requirements.txt
index 1352d5e..2a0c119 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
 argparse
+six>=1.6.0
diff --git a/stevedore/example/base.py b/stevedore/example/base.py
index d128a53..1c8ca4c 100644
--- a/stevedore/example/base.py
+++ b/stevedore/example/base.py
@@ -1,12 +1,13 @@
 import abc
 
+import six
 
+
+@six.add_metaclass(abc.ABCMeta)
 class FormatterBase(object):
     """Base class for example plugin used in the tutoral.
     """
 
-    __metaclass__ = abc.ABCMeta
-
     def __init__(self, max_width=60):
         self.max_width = max_width
 
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